diff --git a/federation/pkg/federation-controller/deployment/deploymentcontroller.go b/federation/pkg/federation-controller/deployment/deploymentcontroller.go index 0fada4c1055..148114ddd32 100644 --- a/federation/pkg/federation-controller/deployment/deploymentcontroller.go +++ b/federation/pkg/federation-controller/deployment/deploymentcontroller.go @@ -29,16 +29,19 @@ import ( fedv1 "k8s.io/kubernetes/federation/apis/federation/v1beta1" fedclientset "k8s.io/kubernetes/federation/client/clientset_generated/federation_release_1_5" fedutil "k8s.io/kubernetes/federation/pkg/federation-controller/util" + "k8s.io/kubernetes/federation/pkg/federation-controller/util/deletionhelper" "k8s.io/kubernetes/federation/pkg/federation-controller/util/eventsink" "k8s.io/kubernetes/federation/pkg/federation-controller/util/planner" "k8s.io/kubernetes/federation/pkg/federation-controller/util/podanalyzer" "k8s.io/kubernetes/pkg/api" + "k8s.io/kubernetes/pkg/api/errors" apiv1 "k8s.io/kubernetes/pkg/api/v1" extensionsv1 "k8s.io/kubernetes/pkg/apis/extensions/v1beta1" "k8s.io/kubernetes/pkg/client/cache" kubeclientset "k8s.io/kubernetes/pkg/client/clientset_generated/release_1_5" "k8s.io/kubernetes/pkg/client/record" "k8s.io/kubernetes/pkg/controller" + "k8s.io/kubernetes/pkg/conversion" "k8s.io/kubernetes/pkg/runtime" "k8s.io/kubernetes/pkg/util/flowcontrol" "k8s.io/kubernetes/pkg/util/wait" @@ -92,6 +95,8 @@ type DeploymentController struct { deploymentBackoff *flowcontrol.Backoff eventRecorder record.EventRecorder + deletionHelper *deletionhelper.DeletionHelper + defaultPlanner *planner.Planner } @@ -202,9 +207,72 @@ func NewDeploymentController(federationClient fedclientset.Interface) *Deploymen return err }) + fdc.deletionHelper = deletionhelper.NewDeletionHelper( + fdc.hasFinalizerFunc, + fdc.removeFinalizerFunc, + fdc.addFinalizerFunc, + // objNameFunc + func(obj runtime.Object) string { + deployment := obj.(*extensionsv1.Deployment) + return deployment.Name + }, + updateTimeout, + fdc.eventRecorder, + fdc.fedDeploymentInformer, + fdc.fedUpdater, + ) + return fdc } +// Returns true if the given object has the given finalizer in its ObjectMeta. +func (fdc *DeploymentController) hasFinalizerFunc(obj runtime.Object, finalizer string) bool { + deployment := obj.(*extensionsv1.Deployment) + for i := range deployment.ObjectMeta.Finalizers { + if string(deployment.ObjectMeta.Finalizers[i]) == finalizer { + return true + } + } + return false +} + +// Removes the finalizer from the given objects ObjectMeta. +// Assumes that the given object is a deployment. +func (fdc *DeploymentController) removeFinalizerFunc(obj runtime.Object, finalizer string) (runtime.Object, error) { + deployment := obj.(*extensionsv1.Deployment) + newFinalizers := []string{} + hasFinalizer := false + for i := range deployment.ObjectMeta.Finalizers { + if string(deployment.ObjectMeta.Finalizers[i]) != finalizer { + newFinalizers = append(newFinalizers, deployment.ObjectMeta.Finalizers[i]) + } else { + hasFinalizer = true + } + } + if !hasFinalizer { + // Nothing to do. + return obj, nil + } + deployment.ObjectMeta.Finalizers = newFinalizers + deployment, err := fdc.fedClient.Extensions().Deployments(deployment.Namespace).Update(deployment) + if err != nil { + return nil, fmt.Errorf("failed to remove finalizer %s from deployment %s: %v", finalizer, deployment.Name, err) + } + return deployment, nil +} + +// Adds the given finalizer to the given objects ObjectMeta. +// Assumes that the given object is a deployment. +func (fdc *DeploymentController) addFinalizerFunc(obj runtime.Object, finalizer string) (runtime.Object, error) { + deployment := obj.(*extensionsv1.Deployment) + deployment.ObjectMeta.Finalizers = append(deployment.ObjectMeta.Finalizers, finalizer) + deployment, err := fdc.fedClient.Extensions().Deployments(deployment.Namespace).Update(deployment) + if err != nil { + return nil, fmt.Errorf("failed to add finalizer %s to deployment %s: %v", finalizer, deployment.Name, err) + } + return deployment, nil +} + func (fdc *DeploymentController) Run(workers int, stopCh <-chan struct{}) { go fdc.deploymentController.Run(stopCh) fdc.fedDeploymentInformer.Start() @@ -414,7 +482,7 @@ func (fdc *DeploymentController) reconcileDeployment(key string) (reconciliation startTime := time.Now() defer glog.V(4).Infof("Finished reconcile deployment %q (%v)", key, time.Now().Sub(startTime)) - obj, exists, err := fdc.deploymentStore.GetByKey(key) + objFromStore, exists, err := fdc.deploymentStore.GetByKey(key) if err != nil { return statusError, err } @@ -422,7 +490,35 @@ func (fdc *DeploymentController) reconcileDeployment(key string) (reconciliation // don't delete local deployments for now. Do not reconcile it anymore. return statusAllOk, nil } - fd := obj.(*extensionsv1.Deployment) + obj, err := conversion.NewCloner().DeepCopy(objFromStore) + fd, ok := obj.(*extensionsv1.Deployment) + if err != nil || !ok { + glog.Errorf("Error in retrieving obj from store: %v, %v", ok, err) + return statusError, err + } + + if fd.DeletionTimestamp != nil { + if err := fdc.delete(fd); err != nil { + glog.Errorf("Failed to delete %s: %v", fd.Name, err) + fdc.eventRecorder.Eventf(fd, api.EventTypeNormal, "DeleteFailed", + "Deployment delete failed: %v", err) + return statusError, err + } + return statusAllOk, nil + } + + glog.V(3).Infof("Ensuring delete object from underlying clusters finalizer for deployment: %s", + fd.Name) + // Add the required finalizers before creating a deployment in underlying clusters. + updatedDeploymentObj, err := fdc.deletionHelper.EnsureFinalizers(fd) + if err != nil { + glog.Errorf("Failed to ensure delete object from underlying clusters finalizer in deployment %s: %v", + fd.Name, err) + return statusError, err + } + fd = updatedDeploymentObj.(*extensionsv1.Deployment) + + glog.V(3).Infof("Syncing deployment %s in underlying clusters", fd.Name) clusters, err := fdc.fedDeploymentInformer.GetReadyClusters() if err != nil { @@ -541,3 +637,23 @@ func (fdc *DeploymentController) reconcileDeploymentsOnClusterChange() { fdc.deliverDeploymentByKey(key, 0, false) } } + +// delete deletes the given deployment or returns error if the deletion was not complete. +func (fdc *DeploymentController) delete(deployment *extensionsv1.Deployment) error { + glog.V(3).Infof("Handling deletion of deployment: %v", *deployment) + _, err := fdc.deletionHelper.HandleObjectInUnderlyingClusters(deployment) + if err != nil { + return err + } + + err = fdc.fedClient.Extensions().Deployments(deployment.Namespace).Delete(deployment.Name, nil) + if err != nil { + // Its all good if the error is not found error. That means it is deleted already and we do not have to do anything. + // This is expected when we are processing an update as a result of deployment finalizer deletion. + // The process that deleted the last finalizer is also going to delete the deployment and we do not have to do anything. + if !errors.IsNotFound(err) { + return fmt.Errorf("failed to delete deployment: %v", err) + } + } + return nil +}